tpu = None
try:
tpu = tf.distribute.cluster_resolver.TPUClusterResolver()
tf.config.experimental_connect_to_cluster(tpu)
tf.tpu.experimental.initialize_tpu_system(tpu)
strategy = tf.distribute.experimental.TPUStrategy(tpu)
except ValueError:
tf.config.optimizer.set_jit(enabled = "autoclustering")
strategy = tf.distribute.get_strategy()
AUTOTUNE = tf.data.experimental.AUTOTUNE
